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Homeostasis and Feedback Loops

Total questions: 17

Worksheet time: 11mins

Name
Class
Date
1.
The tendency of an organism to maintain a balanced state in order to stay healthy.
a)
Stimuli
b)
Response
c)
Tropism
d)
Homestasis
2.
What is the endocrine system?
a)
senses the hormone levels in the blood
b)
controls all other endocrine glands
c)
A group of glands that work together with the nervous system to coordinate all body functions
d)
decreases bone calcium levels
3.

What are released by the endocrine system?

a)

blood

b)

glucose

c)

hormones

d)

water

4.

A hormone is

a)

a chemical substance produced by a gland and carried by the lymph.

b)

an enzyme produced by a gland and carried by the blood.

c)

a chemical substance produced by an organ and carried by the blood.

d)

a chemical substance produced by a gland and carried by the blood.

5.

What is the point of a feedback loop?

a)

To provide the body with more energy

b)

To provide the body with more food

c)

To make sure the conditions in the body are always changing

d)

To make sure the conditions in the body remain stable

6.

increases or speeds up original change

a)

negative feedback

b)

positive feedback

c)

endotherm

d)

ectotherm

7.
Negative Feedback Loops:
a)
amplify processes
b)
prevent small changes from getting larger
c)
are initiated during childbirth
d)
are found only in plants
8.
Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.
a)
positive feedback mechanisms
b)
set points
c)
a wide internal range
d)
no regulation
9.
The "cause" for something to happen is the
a)
response
b)
effect
c)
stimulus
d)
homeostasis
10.

Detects change and sends a message to the control center

a)

receptor

b)

control center

c)

effector

d)

regulation

11.

Receives the message from the receptor and coordinates a response

a)

control center

b)

effector

c)

glucagon

d)

homeostasis

12.
The "effect" of a given stimulus is the...
a)
response
b)
stimulus
c)
cause
d)
result
13.

responds to the output from the control center

a)

control center

b)

receptor

c)

thermoregulation

d)

effector

14.
Maintaining body temperature is an example of a:
a)
negative feedback loop
b)
positive feedback loop
15.
When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
16.
The process of childbirth is an example of:
a)
negative feedback loop
b)
positive feedback loop
17.
When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels. 
a)
Positive Feedback Response
b)
Negative Feedback Loop 

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